How Do I Access My Photos Library In iMovie?

My iMovie recently updated and I can no longer access my photos or videos from the side bar. Some show up there in “years” of some old albums but recent photos/videos are no longer in the project/media screen. I know I can drag photos/videos to my desk top and then drag them into imovie, but it would be much easier the way it used to be directly from that media window. Any suggestions?
Ken
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Kenneth Vignona